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Home >> BMW >> 2013 >> Z4 28i, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1327 (Brakes - Repair -- Z4_E89) >> Master Brake Cylinder >> 34 31 181 Removing and installing/replacing expansion tank for hydraulic brake actuation

34 31 181 Removing and installing/replacing expansion tank for hydraulic brake actuation

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Necessary preliminary tasks: 

Do not reuse drawn out brake fluid.

If necessary, pull off supply hose of clutch hydraulic system if necessary.

Unfasten plug connection (1) and disconnect.

Release screw (2).

Pull expansion tank in direction of arrow vertically out of brake master cylinder.

Fig 1: Pulling Expansion Tank Out Of Brake Master Cylinder
G06908341Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT:

Check rubber plug in brake master cylinder for damage and replace if necessary.

Push the expansion tank vertically onto the master brake cylinder.

After installation: 

Fig 2: Pushing Expansion Tank Onto Master Brake Cylinder
G04726651Courtesy of BMW OF NORTH AMERICA, INC.